// Author: Wang Hsutung
// Date: 2015/05
#ifndef _TRIANGLE_H
#define _TRIANGLE_H

using namespace std;

class Triangle {
      private:
	double a, b, c;
      public:
	 Triangle();
	 Triangle(double, double, double);
	double Area();
	friend bool operator>(Triangle, Triangle);
	friend bool operator<(Triangle, Triangle);
	friend bool operator==(Triangle, Triangle);
	friend bool operator!=(Triangle, Triangle);
};

#endif				// _TRIANGLE_H
